Single example or member of the not domain of prokaryotes.

The term archaeon, that is, is the . Contrast with the formal Archaea as well as the but informal archaea.

See also archaeal, , , and domain Archaea. Contrast also with Archaean.

For example, one could say, "this archaeon" versus "those archaea". Alternatively, and more formally, one could say, "the Archaea".